tracing my family

Hi,can anyone help me,Iam trying to trace Harriet Sophia Doidge all that I know about her is that she was confirmed on the 16th Aug 1925 in Riversdale at the Church of Province of South Africain Riversdale.She had her First Communion on 30th Aug 1925 by Henry Bishop of George. I think that she might be my mother,if so then I can learn more about my family. Any information about this matter would be greatly appreciated. South Africa.